zuul 网关 filter

 

给网关做一个拦截

 

import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;
 
import org.springframework.cloud.netflix.zuul.filters.support.FilterConstants;
import org.springframework.stereotype.Component;
 
import javax.servlet.http.HttpServletRequest;
 
/**
 * 请求拦截
 *
 * @author H
 * @version $id:LoginFilter.java, v 1.0 2022/4/4 15:51:37 $
 */
@Component
public class RequestFilter extends ZuulFilter {
    @Override
    public String filterType() {
        return FilterConstants.PRE_TYPE;
    }
 
    @Override
    public int filterOrder() {
        return 0;
    }
 
    @Override
    public boolean shouldFilter() {
        return true;
    }
 
    @Override
    public Object run() {
        System.out.println("进入zuul拦截-login拦截");
        //获取上下文
        RequestContext ctx = RequestContext.getCurrentContext();
        //获取Request
        HttpServletRequest request = ctx.getRequest();
        //获取请求参数
        String token = request.getHeader("head_userName");
        System.out.println("参数token=" + token);
 
        return null;
    }
 
}

 

FilterConstants 拦截的类型有几种

String ERROR_TYPE = "error";
String POST_TYPE = "post";
String PRE_TYPE = "pre";
String ROUTE_TYPE = "route";

 

pre: 在进入请求之前进入这个filter

post: 请求完成之后再进入这个filter